Improvement in chairs



UNITED STATES PATENT QEEICE.

RICHARD P. BURKHARDT, OF DAYTON, OHIO.

IMPROVEMENT IN CHAIRS.

Specification forming part of Letters Patent No. 179,680, dated July 11,1876; application Bled June 17, 1876.

To all whom it may concern:

Be it known that I, RICHARD P. BURK- HARDT, ot' Dayton, in the countyoi' Montgomer)7 and State of Ohio, have invented certain new and usei'ulImprovements in Chairs; and I do hereby declare the following to be afull, clear, and exact description ot' the same.

This invention relates particularly to that class of chairs known ascottage or roundsea-t chairs, in which the seat frame is composedof'four sawed arc-pieces or segments, with their ends abutting; and myobject is to effect the Inore secure junction of the legs with theseat-traine at a point where it is most liable to break asunder.

Myimprovement consists in forming transverse dovetailed mortises on theunder side of the seat-frame, and on each side ot' the ljoint, to theend that a cleat (through which the legtenon passes, having dovetailedtongues upon its top face to tit into the mortises upon the seat-frame)may hold the abutting pieces of the traine tightly together without eventhe aid of glue, all as will be herewith set forth.

To enable others skilled in the art to which my invention appertains tomake and use it, I would thus proceed to describe the same, referring tothe accompanying drawing, in

f which- Figure l is a sectional view of parts ot' the seat-frameat thejoint, showing the applicaim Dowel-pins a, Fig. 3, unite the abuttingends of the seat-frame, and may, or may not, b glued into place.

aid of glue, a secure fastening, for the dovetailed tongues upon thecleat tirmly hold the abutting ends ot' the frame together, and thelegtenon, passing through the cleat into the frame, prevents the removalofthe cleat from the frame. Thus a self-locking device is formed, whichcombines in itself strength and Asini plicity.

I ani aware that it is not new to secure a cleat through which theleg-tenen passes to the under side of the seat-frame by means of screws,glue, or dowel-pins, or even by a longitudinal tongue upon the cleat,tting into a corresponding mortise in the frame; but such means otfastening are all more or less insecure, and soonbreak asunder.

My device, on the contrary, does` not depend on dowel-pins or otherextraneous devices, but the part-s are themselves inter-locked toaccomplis-h the purpose.

Having thus fully described my invention, I claim as new` Thecombination of the cleat D, having on its top surt'ace the paralleldovetailed tongues b, with the seat-frame A B, having its abutting endsunit-ed by dowel-pins, and having on its under side the transverseandparallel dovetailed mortises C, in which the tongues b t, and the leg.whose tenon E passes through the cleat into the frame to interlock theparts,

.substantially as and t'or the purpose specified.

Witness my hand this 13th day of June, A. D. 1876.

RICHARD P. BURKH ARDT.

Witnesses GHAs. M. PEcK, WM. RiTcnIE.

